package com.heima.app.gateway.filter;


import com.heima.app.gateway.util.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

@Component
@Slf4j
public class AuthorizeFilter implements Ordered, GlobalFilter {
    private static final List<String> RELEASE_URL = new ArrayList<>(Arrays.asList("/user/api/v1/login/login_auth","/user/api/v1/login/login_auth/"));

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1.判断请求路径是否需要拦截
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        URI uri = request.getURI();
        //2.不需要则直接放行
        if (RELEASE_URL.indexOf(uri.getPath()) > -1) {
            return chain.filter(exchange);
        }
        //3.需要则获取请求中的令牌
        String token = request.getHeaders().getFirst("token");
        if (StringUtils.isEmpty(token)){
            //4.令牌不存在，则返回友好错误消息提示
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        //5.令牌存在，解析令牌：解析失败（篡改、过期、伪造），返回友好错误提示
        Claims claimsBody = AppJwtUtil.getClaimsBody(token);
        int verifyToken = AppJwtUtil.verifyToken(claimsBody);
        if (verifyToken>0){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        //6.解析成功，把用户ID存入请求头，放行请求
        String id = String.valueOf(claimsBody.get("id"));
        request.mutate().header("id",id);
        return chain.filter(exchange);
        //        //1.获取request和response对象
//        ServerHttpRequest request = exchange.getRequest();
//        ServerHttpResponse response = exchange.getResponse();
//
//        //2.判断是否是登录
//        if(request.getURI().getPath().contains("/login")){
//            //放行
//            return chain.filter(exchange);
//        }
//
//
//        //3.获取token
//        String token = request.getHeaders().getFirst("token");
//
//        //4.判断token是否存在
//        if(StringUtils.isBlank(token)){
//            response.setStatusCode(HttpStatus.UNAUTHORIZED);
//            return response.setComplete();
//        }
//
//        //5.判断token是否有效
//        try {
//            Claims claimsBody = AppJwtUtil.getClaimsBody(token);
//            //是否是过期
//            int result = AppJwtUtil.verifyToken(claimsBody);
//            if(result == 1 || result  == 2){
//                response.setStatusCode(HttpStatus.UNAUTHORIZED);
//                return response.setComplete();
//            }
//        }catch (Exception e){
//            e.printStackTrace();
//            response.setStatusCode(HttpStatus.UNAUTHORIZED);
//            return response.setComplete();
//        }
//
//        //6.放行
//        return chain.filter(exchange);
    }

    /**
     * 优先级设置  值越小  优先级越高
     *
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }
}
